A −6.30-D lens is held 14.5cm from an ant 1.00mm high.
Find the image distance. Follow the sign conventions.
Express your answer to three significant figures and include the appropriate units.

Respuesta :

f = 1/D

f = 1/6.3 = 15.87cm

1/f = 1/v - 1/u --> 1/v = -1/f - 1/u --> 1/v = -1/15.87 - 1/14.5 = -0.131977

(-0.131977)^-1 = -7.577

We have that  the image distance of the object (obeying signs) is [tex]q=-7.61cm[/tex]

From the question we are told that:

Object distance [tex]d=14.5[/tex]

Power [tex]P=-6.30[/tex]

Object Height [tex]h=1.00mm=>0.1cm[/tex]

Generally, the equation for Lens Power is mathematically given by

[tex]P=\frac{1}{f}[/tex]

[tex]-6.3=\frac{1}{f}[/tex]

[tex]f=16cm[/tex]

Therefore

Apply Lens equation we have

[tex]\frac{1}{f}=\frac{1}{d}+\frac{1}{q}[/tex]

[tex]\frac{1}{q}=-\frac{1}{14.5}+\frac{1}{16}[/tex]

[tex]q=-7.61cm[/tex]

In conclusion

The image distance of the object (obeying signs) is [tex]q=-7.61cm[/tex]

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